TAU Cloud Microphysical Code: Method of Moments

Cloud Parcel Model Documentation

General

The code uses the "bin" or "sectional" approach, which means that the drop size distribution is resolved into a number of size bins (in this case 35). It differs from most other microphysical codes in that it solves for two (or more) moments of the drop size distribution in each of the bins. This allows for a more accurate transfer of mass between bins and alleviates anomalous drop growth.

It is based on microphysical routines developed primarily at Tel Aviv University, but also at NOAA, Colorado State University, NCAR and Penn State University. The original components were developed by Tzivion et al. (1987), (1989), Feingold et al. (1988) with later applications and development documented in Reisin et al. (1996), Stevens et al. (1996), Feingold et al. (1999), Tzivion et al. (1999), Yin et al (2000) and Harrington et al. (2000). The main references can be found below. Users are urged to read the earlier references before using the code.

The software is provided "as-is." The code has no express or implied warranties and the authors of the code assume no responsibility or liability for unintended results, or damages stemming from its use.

Processes considered in this code:

Activation of particles from a population of CCN considered to be composed of ammonium sulfate